Explanation:

The word 'क्षत्रियाधम' can be broken down as 'क्षत्रिय में अधम' (lowest/worst among Kshatriyas). In this compound, the second word 'अधम' is dominant, and there is a case ending (में - in/among) implied between the two parts. This structure is characteristic of 'तत्पुरुष समास' (Tatpurush Samas), specifically a Saptami Tatpurush (Locative case). Option B (Avyayibhav) involves an indeclinable first part. Option C (Bahuvrihi) describes a third entity. Option D (Karmadharay) describes a noun with an adjective or comparison.